Gun sighting device.



533E mwnnm Hi JUST.

GUN SiGHTlNG DEVICE.

APPLICATION FILED AUG.25, 1914.

Patented Nov. 2, 1915.

3%. @EQEtiE'E'REGAL KNSE'RUMENTS.

UNITED STATS OFFICE.

GUN SIGHTING DEVICE.

Specification of Letters Patent.

Patented Nov. 2, 1915.

Application filed August 25, 1914. Serial No. 858,522.

To all whom it may concern:

Be it known that I, I'TEINRICH JUST, a citizen of the German Empire, resldingat Essen on the Ruhr, Germany, have invented certain new and useful Improvements in Gun Sighting Devices, of which the following is a specification.

The subject matter of the present invention is a gun sighting device having an arrangement for automatic correction of the firing angle, when a point is to be aimed at which is situated a certain known distance above or below the point to be fired at.

One embodiment of the invention is illustrated in the accompanying drawing as a sighting device, which is provided witlran index, adjustable from a controlling station in accordance with the range, and

Figure 1 shows a side view of the sighting device; Fig. 2 a section along line 2-2 of Fig. 1 seen from above and Fig. 3 a section along line 3-3 of Fig. 2 seen in the direction of arrow ae.

A housing A for the sighting device, which is provided with a telescope, not shown, is rigidly secured on the cradle in which the gun in the usual manner is made to slide, the gun and the cradle not being shown.

The telescope is mounted on the head of the sight rack B which is adjustably carried in the housing A. To set the sight line at the angle between the sight line and the axis of the bore, which angle corresponds to the range, a worm C is provided having a hand wheel 0 which worm is revolubly mounted in the housing A. The worm C is in mesh with a worm wheel D, which is rigidly connected with a spur wheel D engaging with teeth 5 of the sight rack. On the worm shaft is also provided a second worm C in mesh with a worm wheel E, Fig. 3, which is loosely mounted on a journal F rigidly connected with the housing A. A small electric motor G, Fig. 2, is secured on the worm wheel E eccentrically to its axis of revolution, which motor acts as receiver for a remote electric control. The shaft of the electric motor G is provided with a self locking worm 9 which is in mesh with a worm wheel H freely revoluble on the journal F. With the worm wheel H an index k is rigidly connected which may register either with a fixed mark a on the housing A, see Figs. 1 and 2, or with a movable mark 2',

Fig. 1, the latter mark being carried by a disk J, which is revoluble independent of the worm wheel H and coaxial therewith. The disk J with the mark 2' has a tooth sector 2' meshing with a pinion carried at one end of a shaft K, mountedin bearings in the housing A. At its other end, the shaft carries a second pinion 70 Figs. 2 and 3, driven by a rod M, slidably mounted in the housing A, this rod being provided at one end with teeth m Fig. 3, meshing with the pinion 70 At its other end, the rod carries a projection of, Figs, 2 and 3, which engages with a spiral groove 71. of a disk N, which is rigidly connected in an easily detachable manner, with the worm wheel D.

The fixed mark a is used when the point to be hit is aimed at, but the movable mark 11 when a point of different altitude than the one to be hit, is aimed at, which former point may for instance be situated 10 meters above the latter part.

In the first instance the sighting is done in the following manner. The controller at the remote electric controlling station is first set to correspond to the range of the target. This setting causes a turning of the driving shaft of the electric motor G, which turning is transmitted to the index 72. through the worm gear 9 H. The index it thus receives an angular position that corresponds to the range of the target relative to the worm wheel E, which is rigidly connected with the motor housing. The worm wheel E, together with the motor G and the index If, which is coupled to the worm wheel E through the self locking worm gearing g H, are now moved by turning the hand wheel C until the index k registers with the mark a The turning of the hand wheel C is simultaneously transmitted, by means of the gears C, D, D 6 to the sight rack B, in such a manner, that the sight line receives an inclination relative to the axis of the bore, corresponding to the range of the target.

In the second instance, that is, when the point to be hit is not aimed at but a point situated 10 meters above the same, the sight line for the same range to the target, after adjustment of the sighting device must then form an angle with the axis of the bore, which angle is a certain amount smaller than the angle in the first mentioned instance. The magnitude of this amount is only dependent on the range, for a certain constant difference in height, and it diminishes with increasing range. By suitable selection of the shape of the cam groove 71 it is obviously quite easy to arrange so that the movable mark i when the sighting device is adjusted by means of the gearing N n m M m k K 7: i actu ated by the turning of the hand wheel C is always turned relative to the fixed mark a exactly such an amount, that the sight line with regard to the above mentioned difference in height, receives the correct inclination to the axis of the bore, if the index k previously adjusted as in the first instance relative to the worm wheel E to correspond to the range of the target, is now made to register with the movable mark 71 instead of with the fixed mark a As for each difierence in height, a difierent shape of the cam groove will appear, a special disk N with correspondingly shaped cam grooves must naturally be provided for each difference in height, in case several such difierences are to be used, so that when necessary, the easily detachable disk N may be replaced by another.

I claim 1. A gun sighting device having an index, a movable mark with which said index is made to register when the sight is aimed at a point of diflerent height than the point to be fired at; a drive for setting the sight to the firing angle, and a gearing positively connected to said drive for giving said index and said movable mark an adjustment relative to each other, the amount of said adj ustment being inverse to the range.

2. A gun sighting device having an index, a fixed mark with which said index is made to register for direct firing a movable mark with which the index is made to register when the sight is aimed at a point of difien ent height than the point to be fired at; a drive for setting the sight to the firing angle, and a gearing positively connected to said drive for giving said index and said movable mark an adjustment relative to each other, the amount of said adjustment being inverse to the range.

3. A gun sighting device having an index, a fixed mark with which said index is made to register for direct firing; a movable mark with which the index is made to register when the sight is aimed at a point of difierent height than the point to be fired at; a drive for setting the sight to the firing angle,

and a gearing positively connected to said drive for giving said index and said movable mark an adjustment relative to each other, the amount of said adjustment being inverse to the range said gearing also adjusting said movable mark relative to the fixed mark.

4. A gun sighting device having an index, a fixed mark with which said index is made to register for direct firing; a movable mark with which the index is made to register when the sight is aimed at a point of different height than the point to be fired at; a drive for setting the sight to the firing angle, and a gearing positively connected to said drive for giving said index and said mov able mark an adjustment relative to each other, the amount of said adjustment being inverse to the range, said gearing having a revoluble member and means for turning said member an angle corresponding to the firing angle; a carrier for said movable mark, said carrier being coaxially mounted with said index, said carrier having teeth, a pinion meshing with said teeth and means positively connected with said drive for turning said pinion.

5. A gun sighting device having an index, a fixed mark with which said index is made to register for direct firing; a movable mark with which the index is made to register when the sight is aimed at a point of different height than the point to be fired at; a drive for setting the sight to the firing angle, and a gearing positively connected to said drive for giving said index and said movable mark an adjustment relative to each other, the amount of said adjustment being inverse to the range, said gearing having a revoluble member and means for turning said member an angle corresponding to the firing angle; a carrier for said movable mark, said carrier being coaxially mounted with said index, said carrier having teeth, a pinion meshing with said teeth; and a cam member positively connected with said drive, a sliding rod engaging with said cam member, and gearing connection between said rod and said pinion.

In testimony whereof the foregoing specification is signed in the presence of two witnesses.

HEINRICH JUST. 1,. s]

Witnesses HELEN Norma, ALBERT NUTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

